Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e82d8789b2543e4…

MALICIOUS

PDF

104.7 KB Created: 2021-01-26 10:08:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 0205283e37e177aa3813e342866163c2 SHA-1: 6c5c9bc1bea03290b7bd6aa1580a83589f283cb8 SHA-256: 2e82d8789b2543e40558311b06fb4d600ff7d711a4d9a2f97eb34d5e7bf6f8c5
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to disposable hosting services and known malicious redirectors. This behavior is indicative of a link farm designed to distribute phishing content or malware. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/wb?keyword=1%20image%204%20words%20level%2034 In PDF document text
    • https://sadozilodefizon.weebly.com/uploads/1/3/4/6/134659806/9406996.pdfIn PDF document text
    • http://4escam-bot.online/the_spearman_rank_correlation_coefficientpbouu.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/fOQxhaG/atomus_hd_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/xezalagefog/jblwjgK/love_rosie_trailer_song.pdfIn PDF document text
    • https://zafapuguma.weebly.com/uploads/1/3/2/7/132712217/9576b40a1.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwibagula/RP1s86s/97226349105.pdfIn PDF document text
    • https://sowematawenuw.weebly.com/uploads/1/3/1/1/131164153/7463291.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/8692416.pdfIn PDF document text
    • https://tijawuxegolizad.weebly.com/uploads/1/3/4/5/134597381/zukavazuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/hjjb7WL/my_walmart_schedule_app_canada_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/Dgjjghi/joturoriwizo.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/16264105320yxfe8.pdfIn PDF document text
    • http://epaytds.xyz/idle_world_earth_2._0irrdf.pdfIn PDF document text
    • https://xowogibudul.weebly.com/uploads/1/3/4/4/134446034/pajamete_busiferi.pdfIn PDF document text
    • https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/81d8c5.pdfIn PDF document text
    • https://cdn.sqhk.co/vudararemane/HijTqje/marshalls_store_near_me_open.pdfIn PDF document text
    • https://tiruvodeg.weebly.com/uploads/1/3/4/8/134892329/aa2b1e00fb.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/hbhaYkO/wewulavezalifunepada.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00014290.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14290 18228 bytes
SHA-256: b1021033b27a93eec4ba40293a640028b85034fa086583e322eb9a3f5845b17e
font_00_sfnt_off00012fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD8 5504 bytes
SHA-256: f9dc98954c0e54a5754235a1d78e710db8050cb7a895c096a23feabc56282a1e
font_02_sfnt_off000172e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172E9 9988 bytes
SHA-256: 5c9aec097281c0907b01db46d3a1b74a9c2a2ff4bd0f9f3714789dec97054703

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